Pump operated by compressed air.



No. 876.848. ATENTED JAN. 14, 190x.

' D, vv. STARRETT.

PUMPUPHRATED BY COMPRESSED AIR.

APPMCA'HUN HLED H5512.- i904. RENBWBD APR. 8,'100'7 Wig I.

lll/

' pipe, a water discharge pipe, an inlet valve, a

. a compressed air motor, and the other cy1- through the valves 23, 24, into the discharge pipe to supply the place of the water that had been discharged from the top of said pipe. Iclaimzl. In an apparatusv of the character described, the combination of the compressed air pipe, the water discharge pipe, the inlet valve for the water, the check valve therefor at the bottom of saidwater discharge pipe, a pump discharging into the space between the inlet and check valves and having a'piston operated bythe compressed air, and a passage from the compressed air pipe to the water discharge pipe suliciently large in relation to the compressed air pressure and the height of the discharge pipe to distribute the air therein suliciently to reduce the weight of the water upon the check valve below the compressed air pressure whereby said pressure canl operate the pump water through said check valve, substantially as described.

2. In an apparatus of the character described, the combination of a compressed air check valve ,at the bottom of the water discharge pipe, `and a pair of cylinders having pistons therein of substantially uniform diameter, said pistons being connected to work in unison,l one of said cylinders being connected with the compressed air pipe to act as inder being connected withthe chamber between the inlet and ycheck valve to act as a pump, and a passage from the compressed air pipe to the lwater dischar e pipe su1li' ciently large 'in relation to the ei ht of the discharge pipe and the compresse air pressure to distribute the air in said dischar ye pipe sulliciently to reduce the weightof te water upon the check valve below` the com- 40 pressed air pressure, whereby said pressure can operate' said pistons to force water throu h said check valves, substantially as descri ed.

3. In an apparatus of the character det valve therein, a cylindrical pump, the

opposite ends of which connect respectively with said compartments, a compressed air cylindrical motor havingv a piston substantially equal in diameter to the pump piston and connected therewith to move in unison,

said compressed air motor lbein connected with the compressed -air pipe to e' operated thereby, an upper compartment having check valves communicating respectively with the lower compartments, said upper 60.

compartment also conimunicatingwith` the water-discharge pipe, and a passagefrom the compressed air pipe-tothe water discharge pipe sufficiently large-to distribute the yair through the latter pipe so as to 'reduce` the 65 weight of the water upon either'of said check valves below the compressed air pressure' whereby the pump can operatev under sai compressed air pressure toorce water there? through, substantially as described. 70

In witness whereof I have hereunto set my hand in the presence-of two subscribing w it-A nesses.

D. W. STARRETT `Witnesses: i

FRANCIS M. WRIGHT, BEssiE GORFINKEL. 

